摘要
根据弹簧式速关阻爆阀的结构形式,采用Pro/E对其进行三维建模,并导入ANSYS/LS-DYNA软件对阀板冲击阀座的过程进行仿真模拟,分析其冲击特性。同时通过动态力学模型计算对比仿真模拟得到的结果,验证其正确性。最后得出结论:ANSYS/LS-DYNA能够准确地仿真模拟阻爆阀关闭时阀板对阀座的冲击过程,且结果表明,阀板与阀座在受冲击时的等效应力应变仍在弹性范围内,但阀板存在反弹现象,对阀座造成二次冲击,这不仅延长了阀门的关闭时间,而且影响了阀门的使用寿命,设计时应采取措施避免。同时需综合考虑阀板与阀座的选材问题。
3D model of the spring type quick-closing explosion-proof valve modeled by Pro/E according to its structure was imported to ANSYS/LS-DYNA, in order to simulate the process of valve plate impacting the valve seat and analyse the impacting performance. And the results of stimulation was compared with the results get from dynamic mechanical model calculation, to confirm its validity. Finally the conclusion is given： ANSYS/LS-DYNA can accurately simulate the process of valve plate impacting the valve seat when the valve is closing, and the results show that equivalent stress and strain of valve plate and valve seat in the impacting process is still in the elastic range. But there is a rebound phenomenon of valve plate which makes the valve seat be impacted again. This not only prolong the valve closing time, but also affect the service life of the valve. So some measures should be taken to avoid it in the design. Meanwhile, the material selection problem of valve plate and seat should be considered synthetically.
出处
《机械》
2014年第8期6-10,57,共6页
Machinery
基金
国家科技重大专项(2011ZX05041-005)
